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Shareholders' Equity	6 Months Ended
	Mar. 31, 2020
Stockholders Equity Note [Abstract]
Shareholders' Equity	17. Shareholders’ Equity In August 2015, the Company’s Board of Directors approved a stock repurchase authorization for which there was as of May 7, 2019 a remaining authority to repurchase 1,362,821 shares of Common Stock. On May 7, 2019, the Company’s Board of Directors increased the Company’s Common Stock repurchase authorization by 8,637,179 shares to 10,000,000 shares as of that date. The Company repurchased 550,853 shares of its Common Stock under this authorization during the six months ended March 31, 2020 at a cost of $40.8 million. The Company repurchased 2,876,713 shares of Common Stock under this authorization during the six months ended March 31, 2019 at a cost of $195.0 million. As of March 31, 2020, the Company had repurchased 2,540,672 shares under this authorization, resulting in remaining authority to repurchase 7,459,328 shares of Common Stock.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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